.container{
    margin-left: auto;
    margin-right: auto;
    width: 600px;
    height: 400px;
    border: 1px solid #333;
    position: relative;
    overflow: hidden;
}
.list{
    position: absolute;
    width: 4200px;
    height: 400px;
}
.list img{
    float: left;
}
button{
    width:40px;
    height: 70px;
    position: absolute;
    top:50%;
    left: -1px;
    transform: translateY(-50%);
    border: none;
    background: url("../images/icon-slides.png");
    cursor: pointer;
    outline: none;
}
#prev{
    background-position-x:84px;
}
#next{
    left:561px;
    background-position-x:-126px;
}
#prev:hover{
    background-position-x: 1px;
}
#next:hover{
    background-position-x: 123px;
}
.btns{
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 15px;
}
.btns>span{
    cursor: pointer;
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 1px solid #fff;
    border-radius: 50%;
    margin-left: 15px;
    background: rgba(0,0,0,0.4);
}
.btns>.current{
    background: #abcdef;
}